Lepa BOL.QUIET PWM Cooling Fan LP-BOL12P-BL Obsidian/Blue LEPA modular frame with LEPA logo halo ring design to increase more airflow S-blade with winglet design to improve cooling efficiency Patented Barometric Oilless (BOL) Bearing for long lifespan and silent spinning PWM speed control for the best balance of performance and silence 4 high-quality brilliant LEDs LEPA modular frame with LEPA logo halo ring design to increase more airflow S-blade with winglet design to improve cooling efficiency Patented Barometric Oilless (BOL) Bearing for long lifespan and silent spinning PWM speed control for the best balance of performance and silence Rubber screws to reduce vibration and keep silent operation Removable fan blades for convenient cleaning 4 high-quality brilliant LEDs